If the italicized part of the sentence is the word <em>courses, </em>then the correct answer is predicate noun/nominative.
A predicate nominative is the first noun found after a linking verb, such as to be, or in this sentence, the verb <em>are. </em>You can see that the first noun following the verb <em>are </em>is the word <em>courses, </em>which means it is a predicate nominative.
By posting inappropriate pictures or silly questions you know where I’m getting.
Explanation:
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you didnt post the passage
answer is
B because
if the word is plugged in then the paragraph would seem as if that it is explaining why you need patience to take pictures of snowflakes