Mexico's political structure differ from that of the united states because..
a. there exists three branches of government
b. the vice president does not serve under the president
c. there exists a multi-party electoral system
d. the president heads the government

Thank you for posting your question here. I hope the answer will help. Mexico's political structure differs from that of the United States because the vice president does not serve under the president. The answer is B. I hope it is the answer your looking for. 

1."lessen the worth of ."

2."increase the worth of."

3." beyond the worth of."

4."against the worth of ."

the answer for this question on edg. is 8/5