Test 6 Section 6 - #12 (page 719)

Here's the rule: If you're comparing things using words like "more" or "less," you use "than." So, "I make more money than Josh" or "Your XBox gamerscore is less than mine." But when you say "as much" or "as little" or, in this case "as expensive" you need to use "as" again. "I make as much money as Josh." Or, "the latter are not nearly as expensive as brand-name drugs."

Test 6 Section 6 - #7 (page 719)

Basically we're looking at concise expression here. The way it's written -- "whether sailed or did not" is redundant. Whether already implies they may or may not have. We can say the same thing much more concisely using D. That they sailed is uncertain, but they COULD have.