Question

Actual evidence of misconduct may not be the most important criteria to determine whether a President gets impeached.

• A. the most important criteria to determining the impeachment of a President.
• B. the most important criterion in determining whether a President gets impeached
• C. the most important criterion to determine if a President gets impeached
• D. the most important criteria for determining the impeachment of a President

Answer 1

The correct option is B the most important criterion in determining whether a President gets impeached

Criterion is singular and criteria, plural. The sentence given refers to only one criterion—evidence of misconduct. So, the options that use ‘criteria’ are wrong.
The usages ‘criterion for determining’ and ‘criterion in determining’ are both correct in the given context. ‘To determine if a president gets impeached’ mixes up tenses, and ‘to determining the impeachment of a President’ is incorrect usage.