A computer equipped with signature-recognition software, which restric

I have picked the answer C for this question:

From the passage, there are 3 things that the software looks to identify an authentic signature:
1. Form of the signature
2. Pen Pressure
3. Signing Speed

Since the question stem is a MUST BE TRUE question, we can always look back at the passage to clarify our answer choice. I didn't even both prephrasing because there are too many possibilities - in this case I jumped straight into the answer choices.

A. Nowhere in the passage do we talk about the software being impractical for use.

The structure of the argument is:
1. Describes how the software identifies signature
2. Explains how forgers can't duplicate all characteristics to gain access

So, it is clear that this answer choice incorrect.

B. Where do we mention installation of software in most banks? Yea, I thought so...definitely incorrect.

C. This answer choice is correct because it describes how forgers cannot obtain access simply by copying "The form of the signature." In order to get access, you need all 3 components: form, speed and pen pressure.

D. Nowhere do we mention the time it took to develop this software. Incorrect.

E. Although this answer may look correct, there are a few things to mention here:

1. The first 3 words "In many cases," sounds to me like most of the time, authorized users are denied access. This wording is quite strong and I cannot find it anywhere in the passage where users are denied access "in many cases."

2. From the passage, can we even prove that users are ever denied access? There is nothing suggesting that they are ever denied access - this software could be perfect.

Therefore, answer choice E may or may not be true. So, this answer is incorrect.