Love and loyalty to one’s motherland and mother-tongue are the cornerstone of one’s identity and self-esteem. Anyone who can’t love his country and national language can’t love anything and anyone in this world. It should be true I don't exactly understand your question
I believe the answer is B
"To write a novel", is the subject in the infinitive phrase.
His ultimate goal is to write a novel. So, "To write a novel" functions as a noun in the sentence. Hence, the answer is A. Noun.
