The correct option is A wants
The sentence refers to a future plan or arrangement which is a general truth. This will take a simple present form of verb.
"Wants" in option A is correct as it is in subject verb agreement and is the correct tense.
"Wanting" in option B is the gerund form which has converted the verb into its continuous form or can be used as a noun. This is not required in the sentence.
"Is wanting" in option C is incorrect as it converts the verb 'want' into an adjective which means lacking.
As option A "wants" is correct, option D "none of these" is void.