Which ones are true and which ones are false?

The phrase to every action there is an equal and opposite reaction is

What is the purpose of the cc option in an email? a. create a carbon copy of the message. b. save the message as a template for future use. c. send a copy of the message to one or more people. d. send a message to multiple recipients.

Need some ! asap i need to figure out 3 major changes in bridges over time and why these changes to adapt to both improvements in technology and changing social links would also alot.