When the leadership changed, his position became precarious. Synonym of theunderlined word is:A. secure ⃝ B. upright ⃝C. uncertain ⃝ D. reliable

To find the synonym of the underlined word "precarious," we need to understand its meaning. Precarious means uncertain or unstable.

Now, let's look at the given options:

A. Secure: This word has the opposite meaning of precarious. It means safe or protected. Therefore, it is not a synonym of precarious.

B. Upright: This word means vertical or standing straight. It does not have the same meaning as precarious, so it is not a synonym.

C. Uncertain: This word has the same meaning as precarious. It means not definite or unsure. Therefore, it is a synonym of precarious.

D. Reliable: This word means trustworthy or dependable. It does not have the same meaning as precarious, so it is not a synonym.

Based on the above analysis, the correct answer is C. Uncertain.