Find out whether there is any grammatical error in below sentence. Are you aware for along time that / by making me waiting / for a long time / my schedule is getting upset?

Are you aware for along time that
by making me waiting
for a long time
my schedule is getting upset? E. No error

The correct answer is: E. No error

The sentence is grammatically correct. The word “for” is used correctly in the phrase “for a long time.” The word “waiting” is the gerund form of the verb “to wait,” and it is used correctly in the phrase “by making me waiting.” The word “upset” is an adjective, and it is used correctly in the phrase “my schedule is getting upset.”

The sentence can be rephrased as follows:

Are you aware that by making me wait for a long time, my schedule is getting upset?

The sentence is still grammatically correct, but it is more concise and easier to read.