Given the task definition and input, reply with output. In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

Article: The New Folk Sound Of Terry Collier attracted little interest when first released , and by the time it was championed on a music chart, Callier had long abandoned music for a career in computer programming.As a result, he returned to music to make many recordings with some leading young artists in Britain, making it the most successful period of his life. Terry Callier was born into a poor family on May 24, 1945 and grew up in Chicago.He learned to practice the piano and began singing in groups in his teens.He released his first single, Look At Me Now in 1962.When offered a tour, he seemed to be a shining star soon.But then his mother stepped in, insisting that, at 17 , his place was not on the road but at home studying. While attending college, he began performing in folk clubs and coffee houses.It was also when he started his songwriting.Callier continued to record and give live concerts through the 1970s touring with some famous popular singers.His combination of fierce guitar, wise lyrics and sweet voices created a distinctive style known as jazz-folk.However, he had more success as a songwriter than as a singer when he sang his hit song The Love We Had Stays on My Mind in 1971. In 1983 he abandoned music completely to attend his 12-year-old daughter after splitting up with his wife.He got a steady job at the University of Chicago and did not touch a guitar for years.Many years later, some DJs discovered his old recordings and began to play his songs in clubs.Though Callier was unwilling to get involved in music again, Callier was eventually persuaded to come back, which brought him more applauses than he had ever experienced.
Question: What was Callier's mother's attitude towards his dream of becoming a star?
Options: (A) supportive. (B) understanding. (C) indifferent. (D) opposed.
D