Carrots sell for $2.10 per pound, and crackers sell for $2.90 per pound. Glen bought some carrots and some crackers. The total weight was 2.3 pounds and cost $6.03. Let p represent the number of pounds of carrots Glen purchased. Which expression represents the number of pounds of crackers he purchases?

A. 2.3p B. 2.3 – p C. p + 2.3 D. p – 2.3