The correct answer is (B) To curb; to hold (back, in, down); to check; to repress, to confine, to set limits to; to repress; to limit; to prevent from doing; to keep in check, under control, or within bounds.

Restrain comes from Old French restraindre, Latin restringere (to draw tight).

Examples of use:

• It was necessary to restrain his dog as the poorly-dressed stranger passed.
• The government has successfully restrained the rate of inflation.