Section 13(d) of the Securities Exchange Act of 1934 requires anyone

There are two ways of writing this one. The first is the use of the command subjunctive form. In the command subjunctive, you have to have a mandatory element (such as requires here) and a connector ‘that’ and finally a basic or command form of the verb (make here)

The construction of such a sentence here will be
Section 13(d) of the Securities Exchange Act of 1934 requires (mandatory element) that (the connector word) anyone who buys more than 5 percent of a company's stock make (the command verb) a public disclosure of the purchase

The other way of writing this is straight and simple. In the second case, you have to use an infinitive verbal and be done with.

For example, when the above sentence is re- written with the infinitive --- Section 13(d) of the Securities Exchange Act of 1934 requires anyone who buys more than 5 percent of a company's stock ‘to make’ (the use of infinitive verbal) public disclosure of the purchase. But don’t skip the ‘to’ for any reason at least the first time

In the given example, Chocie C is correct.