Which of the following sentences contains a compound subject?

a.
the three branches of the u. s. government are legislative, executive, and judicial.

b.
the supreme court, which makes decisions about laws, is part of the judicial branch.

c.
the senate and the house of representatives are part of the legislative branch.

d.
the executive branch includes the president, the vice president, and the president's cabinet.

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.