The correct option is
C laugh
In order to fill in the blank with the most suitable verb, we need to understand the usage of 'make'.'Make' means to force someone to do something. If 'make' is used in a passive (voice) sentence, we use the word 'to' along with the verb. In an active sentence, we do not use 'to' with the verb. The verbs without the marker 'to', are called bare infinitives.As the given sentence is in the active voice, we will use the bare infinitive here.Option A - 'To laugh' can't be used here, as the verb 'laugh' is used with the marker 'to'. As the sentence is in the active voice, we must use the bare infinitive (verb in its original form). Hence, option A is incorrect.
Option C- 'Laughed' is the past form of the verb 'laugh', and as explained above, we need the verb to be in its original form. Hence, option C is incorrect.
Option D - 'Laughing' is the participle form of the verb 'laugh', and hence it can't be used as a bare infinitive. Hence, option D is incorrect.
Option B - 'Laugh' can be used here, as it is in its original form and also, it is used without the marker 'to'. Hence, option B is the correct answer.
'You make me laugh so much.'