B I took the test and got it right
I think the answer would be A
Lava that cools so quickly that the ions do not have time to arrange themselves into crystals with definite shape will form igneous rocks with FINE GRAINED TEXTURE. Igneous rocks are those rocks formed as a result of cooling of magma or lava.
I don't think they would regulate the second scenario.
They are termed as "Excellent Mother" because of the following reasons:
They have long productive lives, cows will produce 10 or more calves calving regularly. ...
They develop excellent resistance to ticks and immunity to tick borne diseases.