An open system is a system where
a. only energy can enter the system
b. can only enter the system and energy
c. can only leave the system matter and energy
d. can enter or leave the system matter and energy
e. can only leave the system

Can enter or leave the system matter and energy. (The correct option is D)

Explanation:

Open system is defined as the system where exchange of matter, and energy occurs with its surrounding, presenting breaking down, and build up of its materials, and import, export of components.

Open system transfer the material into, and out of the system boundary, it contains an external interaction. A good example of open system is living things they actively connect with its environment, in results it shows changes in both the environment, and the living things.

So, the correct option is D.

it is easily magnetized.

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.