Select the most appropriate option that can substitute the highlighted segment in the given sentence.
The road which connecting the two states is overcrowded.

Correct option is B

The correct substitution of the highlighted words is (b) "connects."
Error identification: "Connecting" is incorrect because the present simple tense is needed.
Grammatical Rule used: Use the present simple tense for actions that are general truths or habits.
Corrected sentence: The road which connects the two states is overcrowded.