Use your knowledge of root words and affixes to find the word that best replaces the underlined word.

My parents definitely _underrate_ how difficult my algebra class is.

a. don't believe

C. overestimate

b. value

d underestimate

D. underestimate

Explanation:

Affixes are additions to words, written before it, used to change or modify the word's meaning.

Now, our underlined word is "underrate" which consists of the affix "under" and root word "rate".

To rate something or someone means to give it a certain quality or value.

Under is affix that means below or less (underground = something that is below ground level).

So, now, we can say that to underrate means giving something or someone less credit, lesser value or meaning, taking it for granted.

That means that word that has similar meaning to this is "underestimate".