First, note the question asks you to identify an assumption and then select the answer choice that supports or validates an assumption.
Start with analyzing the passage. The passage draws the following logical chain:
-design flaw leading to more failures of research
-because projects are insured, more failures leads to more insurance claims
-more insurance claims lead to higher premiums and research cost
-higher research cost leading to fewer, but more arduous, research projects
The conclusion, presented in the question, states that the cost of conducting research will keep rising. How could having fewer, but more arduous, research projects still cause the cost of research to keep rising?
The right answer here would need to somehow explain how a decrease in the number of research projects still would lead to a continued increase in research costs. This could be due to an increased cost of insurance--likely from more failures that drive up insurance costs--or a different reason for increased costs. Since the passage draws a link between the number of failures, number of claims, cost of insurance claims, and number of projects, the easiest answer choice would explain how a reduction in the number of projects could drive up number of claims and therefore cost of insurance.
Let's look at the answer choices, starting first with which answers we can eliminate in a first pass.
A. Since the risk to insurers of underwriting research is spread over relatively few projects, insurance premiums are necessarily very high.
At first glance, this maybe could work. Keep.B. When research projects fail, the causes of failure are generally impossible to pinpoint with accuracy.
Not sure about this one, it maybe could work, so keep it.C. The greater the research demands placed on a given project, the more likely that project will fail.
This does present a reason why reducing the number of projects--that are more arduous--would still increase number of failures and claims. Keep D. Most research institutions undertake so few projects that no economies of scale can be realized.
This wouldn't explain a change in cost of projects by reducing the number. It just says that the cost per project is always pretty high. Eliminate. E. Since many research projects are undertaken by coalitions of research institutions, inefficiencies are inevitable.
Has no bearing on a reduction in number of projects. This applies to any number of projects. Eliminate. So, now we're down to three options, A, B, and C. Let's look at them again.
A. Since the risk to insurers of underwriting research is spread over relatively few projects, insurance premiums are necessarily very high.
This could still be possible. It draws a link between number of projects and premiums. Keep still. B. When research projects fail, the causes of failure are generally impossible to pinpoint with accuracy.
So, this would mean projects could continue to fail, likely at the same rate. But, that wouldn't explain why having fewer projects would keep increasing the cost of projects, because I would need to believe that the rate of failure would increase. This doesn't suggest that. Eliminate. C. The greater the research demands placed on a given project, the more likely that project will fail.
Keep this, as it draws a relationship between decreasing the number of projects and rate of failure that would drive up costs. Ok, down to the final two choices.
A. Since the risk to insurers of underwriting research is spread over relatively few projects, insurance premiums are necessarily very high.
C. The greater the research demands placed on a given project, the more likely that project will fail.
Option A would explain why premiums are higher when you have fewer projects. But, we're looking for a reason why having fewer projects would cause the rates to continue to increase. This just suggests that they would rise and then stay at a high level. Option C, on the other hand, tells me that the fewer the number of projects, the greater the likelihood they lead to an insurance claim. This would directly explain how decreasing number of projects--greater rate of failure--increase in number of claims--increase in cost of projects.
Option C is the correct answer.