The answer is option B 'blended family." It's not option A because a nuclear family includes a family with a couple who has children and no step children of any sort. It's not option C because a extended family is including aunts, uncles, and grandparents. It's also not option D because a single parent family only has one parent. Therefore your answer is option B because a blended family includes children from past and present relationships.
The answer is inches. The unit you would use to measure a kite string is inches. It is more convenient to use the length of the string in inches, feet, yard or meters.
