Which statement is false?

A. Parentheticals aren’t crucial to the meaning of a sentence.
B. Parentheticals are like asides.
C. Parentheticals are crucial to the meaning of a sentence.
D. Parentheticals are like comments.

A. Parentheticals aren’t crucial to the meaning of a sentence.

A is incorrect.

Notice the question asks which is FALSE.

To determine which statement is false, let's analyze each statement and its meaning:

A. Parentheticals aren't crucial to the meaning of a sentence.
This statement implies that parentheticals are not important for understanding the meaning of a sentence.

B. Parentheticals are like asides.
This statement suggests that parentheticals are similar to asides, which are additional or supplementary remarks made by a speaker.

C. Parentheticals are crucial to the meaning of a sentence.
This statement indicates that parentheticals play a vital role in understanding the meaning of a sentence.

D. Parentheticals are like comments.
This statement states that parentheticals resemble comments, which are explanatory or informative remarks added to a piece of code or text.

Now, as we evaluate each statement, we need to find the one statement that does not hold true. Given the definitions above:
- Statement A implies that parentheticals are not important, which contradicts the generally accepted purpose of parentheticals in providing additional information. However, it does not necessarily make it false.
- Statement B describes parentheticals as being similar to asides, which is generally true.
- Statement C highlights the importance of parentheticals, aligning with their typical purpose.
- Statement D suggests that parentheticals are comparable to comments, which is accurate.

Based on the analysis, statement A is the false statement as parentheticals do have significance in conveying additional information in a sentence.