i really need help I'm begging you

1.
402.51 meters =_______ millimeters

A. 402.51

B. 0.40251

C. 40,251

D. 402,510

2.
105 Tons = ______lbs

A. 210,000

B. 2,000

C. 105,000

D. 4,000

3.

0!=0

A. true

B. false