During the perioder in the late 1800U. B, there was an explosion of business, mechanization, and factory production

answer; ///i believe that the correct answer is refrigerants,(like r12) and aerosol

answer: president kennedy is vowing to protect freedom in this paragraph.

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.