What is the difference between attr_reader, attr_writer, and attr_accessor in Ruby?
A. attr_reader defines both reader and writer methods, attr_writer defines only reader methods, and attr_accessor defines only writer methods
B. attr_reader defines both reader and writer methods, attr_writer defines only writer methods, and attr_accessor defines only reader methods
C. attr_reader defines only writer methods, attr_writer defines both reader and writer methods, and attr_accessor defines only reader methods
D. attr_reader defines only reader methods, attr_writer defines only writer methods, and attr_accessor defines both
Answer: Option D
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