The correct option is A only for workers and not for students
Option A: As the lines mention, "Some people felt that denim overalls were 'workers clothes' and not right for school.", some people were under the opinion that jeans were only for workers and not for students.
Hence option A is correct.
Option B: These words aren't mentioned anywhere. They're the opposite of the line "Soon, people of all ages wore them". Hence B is incorrect.
Option C: The line, "a newspaper reported that 90% of young Americans were wearing denim pants everywhere except to bed and church" does not indicate that jeans were 'not fashionable for church lovers. Hence C is incorrect.
Option D: The passage does not indicate this line. Hence D is incorrect.