Question

A scientist has been working for 15 years to develop a new type of plastic material, but she has not yet been successful. Which of the following best explains why her work is still a success?

New ideas often develop from unsuccessful experimentation.
The original problem was not solved and can now be abandoned.
Most scientists require several decades of experimenting before achieving their goals.
The scientist has demonstrated that there are no new plastics for scientists to develop.

Answer 1

A

Answer 2

one more:)