The Harappan civilization was known for: A. avoiding contact with other societies.
B. writing messages on clay pots and seals.
C. building the largest armies in the world.
D. never building permanent cities.

the answer is B.  writing messages on clay pots and seals.

Explanation:

The Indus River Valley Civilization, also known as Harappan civilization, developed the first accurate system of standardized weights and measures, some as accurate as to 1.6 mm. Harappans created sculpture, seals, pottery, and jewelry from materials, such as terracotta, metal, and stone.

hope this helps and feel free to give brainiest

c. legislation should seek to resolve social problems.

honestly i really it keep confusion down on some sides