Answer:
a. causes north-flowing currents in the northern hemisphere to curve to the east.
Explanation:
The Coriolis effect it is a force that is produced due to the rotation of the Earth. Because of this, the trajectories of the objects deviate. It is diverted to the right everything that is located in the northern hemisphere and to the left everything that is in the southern hemisphere. This is because the Earth rotates from West to East.
The correct answer is - Olmec.
The Olmec civilization was existing in the period between 1,200 BC up until 400 BC. This civilization developed in Mexico, more specifically in the south-central lowlands of the country. The Olmec were a very advanced civilization for their time, and they are considered as the civilization that set the basis for all the others civilizations in Mesoamerica, like the more ''famous'' Maya and Aztec civilizations. The trademark of the Olmec is the big stone heads, about which there's lot of debates about their purpose and means.
D. A car that went through all the car washes
that way the car would have more experiences