Select the plant that is best described by the following characteristics:
• The name is derived from the plant's fleshy, pinkish-red taproot
• Can be found in cultivated fields and in open areas or along roadsides
• An annual plant which may reach heights of six feet or more
• When not growing in crowded conditions, it will branch freely but if crowded it may send up just one main stem
A. Common Lambsquarter
B. Giant Ragweed
C. Redroot Pigweed
D. Wild Mustard