A.42

B.5292

C.4

D.3

A.All of the nuclear waste in the United States is disposed of in the same way.

B.The United States employs several different methods for nuclear waste disposal.

C.The United States is the only country to use subductive waste disposal techniques.

D.There are a number of active breeder reactors in the United States.

A.To indicate the appropriate level of current

B.To combine with a grounding wire

C.To improve the efficiency of the fuse

D.To enable the fuse to be screwed into a socket

A.Turbogenerators must have steam in order to operate.

B.Turbogenerators were developed in the nineteenth century.

C.Electrical energy is less valuable than heat energy,

D.Wind turbines are inefficient at present.

A.Option A

B.Option C

C.Option B