WHY was the discovery of amylopectin important for scientists? A. It helped scientists to identify rice as a key ingredient of the mortar used in Chinese structures.
B. It helped scientists to create several new water resistant building materials.
C. It helped scientists explain why urine, blood and eggs were used in ancient mortars.
D. It helped scientists to develop effective approaches for constructing modern buildings.

Plsss 10 a candidate running for state governor has an ad on tv. the ad begins with a statement from the candidate about his or her commitment to improve the state, and then shows short interviews with average citizens who describe the candidate as the better choice for improving the state's economy. the ad goes on to display quotes from the opposing candidate printed over a backdrop of closed factories and charts of negative economic statistics. the statistics are associated with the opponent’s political party. what part of the ad uses symbolism to get the candidate's message across? the interviews with average citizens the images of closed factories the statement from the candidate about job programs the quotes from the opposing candidate