<span>A) if
B) after
D) whenever
</span>
In your essay give specific details and don't vague if it is not related to the topic you are writing about, is not important.
The answer B is correct. By google's definition, connotation is 'an idea or feeling that a word invokes in addition to its literal or primary meaning.'
A would not work because you can't depict someone's 'connotation'