He always talks . . . . . . . . secularism. A. to B. about C. for D. none of the above

The correct answer is B. about.

The word “about” is used to introduce a topic of discussion. In this case, the speaker is talking about secularism.

The word “to” is used to indicate that the speaker is talking to someone. In this case, the speaker is not talking to anyone about secularism.

The word “for” is used to indicate that the speaker is supporting or advocating for something. In this case, the speaker is not supporting or advocating for secularism.

The word “none of the above” is used to indicate that none of the other options are correct. In this case, the word “about” is the correct answer.