Answer: C. 3,500 grams
Explanation:
Rodney got D as the answer by because he thought there are three zeros and adding 3 and 5 to the 1,000 35,000.
Because we know the unit rate: 1(kilogram) = 1,000(grams)
Rodney chose the incorrect answer.
Therefore, 3.5 x 1000 = 3,500 is correct