All of the following are characteristics shared by both brazil and mexico, except a. free and fair elections b. the serious challenge of corruption and high crime rates c. widespread civil liberties, such as freedom of speech d. a prime minister who serves as the head of government

D. a prime minister who serves as the head of government

Explanation:

The prime ministers of the both the state are the head of the government. Michel timer is the prime minister of the Brazilian government, as the parliamentary system was introduced in the year 1847, and was briefly restored by the president session. The parliamentary system is voluntarily established by the emperor and identical to the heads of the state and thus the control is daily exercised by the government. Thus co-exists with the head of the stare and the real powers and the influences of the prime minister responsible for the parliament. This prime minister system was adopted n the 1961 in brazil and that of the Mexico stated in the 1917.

The answer would be  b. hope this !