While some have compared the vehicle to a tank or an oversized child's toy or too large to be a personal car, the company remains undaunted.

A. While some have compared the vehicle to a tank or an oversized child's toy or too
B. Because some have compared the vehicle to a tank or an oversized child's toy or too
C. While some have compared the vehicle to a tank or an oversized child's toy, too
D. As some have compared the vehicle to a tank or an oversized child's toy, too
E. Due to the vehicle being compared to a tank or an oversized child's toy, too

[spoiler]OFFICIAL SOLUTION

This sentence focuses on logical meaning. It requires you to not only confirm that there is a conjunction, but understand the difference between positive and negative conjunctions.

There is a contrast between what some believe about the car, "too large to be a personal vehicle," and the company's position, "undaunted." Answer choices (B), (D), and (E) incorrectly relate these two contrasting points. In answer choices (A) and (B), the phrase "compared to" must be used with a noun; "compared to... too large..." is illogical and thus incorrect. Only answer choice (C) correctly provides the contrast, and correctly uses "too large" to modify the oversized vehicle.[/spoiler]