I believe it's D, because without "(especially the corn)" its a complete sentence that still makes sense.
Because I love science fiction
Her parents are being thrifty, which means they're using money carefully by choosing a brand that even if it's not the most well known, it's good.
I think the answer is "Having seen the Statue of Liberty, the Grand Canyon is more impressive." The Grand Canyon has not seen the Statue of Liberty; you have, but you- or "I" - are nowhere in the sentence. To correct the sentence, it would need to read something like this: Having seen the Statue of Liberty, I find the Grand Canyon more impressive.
I was at lunch with my mother and we were discussing current events. We had placed our order about five minutes earlier. Just as we were beginning to become irritated our drinks were brought to us. My mother ordered a soda pop, where as I had ordered an iced tea. My tea was served with a slice of bitter lemon. After drinks, we had a wonderful lunch.
