Great question — Assumption questions are one of the most testable CR question types on GMAT Focus, and this one has a subtle trap built in.
Let me break down the argument first. Daedlus wants to lower operating costs by switching to fortnightly maintenance instead of the standard every-three-months schedule. The claimed benefits are: (1) postponing complete system overhauls that take servers offline for up to seven months, and (2) reducing power consumption by about three percent.
The question asks what the plan assumes — meaning what must be true for the argument to hold.
Step 1: Identify what the plan needs to work.
The goal is to lower operating costs. The plan involves more frequent maintenance. For this to actually lower costs, the savings from avoiding overhauls and reducing power consumption must outweigh the cost of doing maintenance twice a month instead of once a quarter.
Step 2: Evaluate each choice.
A. This is about electricity rates rising — but the argument doesn't depend on future rate changes. The plan already works if current savings hold. Not a necessary assumption.
B. This says cooling system maintenance doesn't put the farm out of commission. But the argument already distinguishes between routine maintenance and complete overhauls. The argument only claims overhauls cause downtime. This doesn't need to be assumed — it's already implied.
C. This says fortnightly maintenance doesn't cost much more than a complete overhaul. Think about it this way: if doing maintenance every two weeks ended up costing far more than the occasional overhaul, the whole cost-saving plan falls apart. This is a necessary assumption.
D. This compares Daedlus to other webhosting services — the argument is only about Daedlus's own costs. Irrelevant comparison.
E. This is about competitive advantage — but the argument is specifically about lowering costs, not about beating competitors.
Answer: C
Common trap: Many students pick B because it sounds safety-related, but the argument already separates "routine maintenance" from "complete overhauls." The real vulnerability is whether the more frequent maintenance schedule actually saves money on net.
Takeaway: On Assumption questions, always ask yourself "what would destroy this argument if it were false?" If fortnightly maintenance costs way more than overhauls, the plan fails — so C must be assumed.