(a) The company was founded on the (principals / principles) of quality and value.
(b) Millions of people are attempting to (lose / loose) weight.
(c) Sunspots have been known to (affect / effect) radio communication.
(d) Professor Poledna received their (compliments / complements) politely.
(e) The ancient symbol depicted a snake eating (it's / its) tail.
(f) Both social and (economical / economic) criteria need to be examined.
(g) It took many years for some of Einstein's theories to be (accepted/ excepted).