Which of these procedures is NOT the same as multiplying a whole number by 1,000?

a.Move each digit of the whole number three places to the left and fill in the blank places with zeros.

b.Multiply the whole number by 10, three times.

c.Add 1,000 to the number, ten times.

d.Move the decimal point three places to the right and fill in the blank places with zeros.

help me please this is so confusinggg