The correct option is A take place
Simple present tense is used to indicate regular actions/facts. The given statement explains a regular action/fact. Therefore, the verb has to be in the simple present tense. The syntax for simple present tense is : Verb in its first form + (s / es) (wIth singular subject) / verb in its first form (with plural subject). As 'Olympic games' is a plural subject, the correct option is: take place.