Whose land did the samurai defend and protect?

The samurai were members of a warrior class who rose to power in Japan from the 12th century onward. Over time, they developed into the 'strong-arm' of the Japanese imperial court, quelling rebellions and fighting for the emperor and his land. Eventually the power of the samurai became so great that they took control of Japan.

Explanation:

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;