Four puzzles that were manufactured contained a total of 420 pieces. The next 6 puzzles contained a total of 630 pieces. If the relationship between the number of puzzles and the total number of puzzle pieces continues to be proportional, which could be the missing entries in the table? A.8 puzzles and 800 pieces B.8 puzzles and 840 pieces C.10 puzzles and 1,000 pieces D.10 puzzles and 1,200 pieces