Read the following excerpt from an oral history: my grandfather had a goal to become a successful business and family man. his goal became a reality in 1955 when he co-owned pimentel's market in hayward, ca with his brother sam who came to america. that is where he also met my grandmother, margaret, whose uncle previously owned the store. 3 years later, in 1958, he married my grandma margaret. in 1960, my grandpa opened his own store called the terrace market in san leandro, ca. my mother was born in 1959; one year before he opened his store, and in 1963 my uncle was born. his children are now grown up and both have received a good education, which allowed them to get good jobs. my grandfather said all he wanted out of his children was for them to get a good education and to make good citizens out of themselves and that's what they did. currently my grandfather resides in hayward, california. he is a retired grocery store owner and spends most of his time with his family and traveling. he is a u. s. citizen and will remain one, though he still likes to visit his homeland. he has been in america for more than half his life but still enjoys eating traditional chinese foods, and celebrating holidays like chinese new year, which is one of his favorites. he celebrates all holidays of the u. s. with his family. throughout my life my grandfather has kept many chinese traditions alive in my family so we do not forget where we came from. his immigration to america has allowed him to have a good life and make something out of himself, where in china he may not have been able to do so. at the close of our interview, he said, 'everything has been good about my immigration experience. i have a great life, great family, and great health, what else could i ask for? ' which best describes how the author develops her central idea? a .she states the central idea explicitly in the last sentence of the first paragraph. b. she gives examples of the ways that her grandfather overcame countless obstacles. c. she provides facts, details, and her grandfather's words to develop the central idea. d. she states the facts and relies mostly on reasons to develop her main idea.