I would probably answer with B, because facial expressions would tell if the reader is pleased, annoyed, saddened, ect. by the content :)
Answer:
x = 0
Explanation:
a = 10
x + a = 10
Substituting a = 10 in equation,
=> x + 10 = 10
=> x = 10 - 10
=> x = 0
He uses humor, as conveyed with the multitude of colors
1:b revising 2:c proof reading 3:a checking for spelling errors 4:<span> D. a step by article about pet grooming written for pet lovers digest. 5: d editing/proofreading</span>
