The answer for this question is A. Predicate adjective.
Who's Elisa, and what book and/or passage are you reading? Nobody can answer without that context.
The correct answer is D) a split infinitive has a word between "to" and the verb. That is why it is called <em>split</em>, because it is separated.
Answer:
The message of the book is that perseverance is necessary for success. If we focus on our goals and learn from others, we will be rewarded in the end.
It's a reap what you sow kind of meaning as well in which perseverance is key for accomplishing our goals.