In the sentence, "the ankle and foot sustained 40 percent of the injuries, especially ligament strains" Sustained is the main verb.
(C) to explain the complexities of proper food storage during Elizabethan times
The passage explains how the different types of food must be stored during Elizabethan times in order for the food to be safe and not spoil. There are many things to consider including how best to preserve meat, the dryness of the cellar and what types of tools are available for salting meat. Also, certain foods may not be stored near each other because of cross contamination issues.
Wouldn't the suffix be en? The suffix isn't the definition, it's the syllable at the end of the word.
