C is correct.
Please vote my answer brainliest. thanks!
300 Identified and confirmed with the exception of 200 that still need to be evaluated.
In the 1900s most immigrants came from western europe
Hey!
Hope this helps...
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A user mentioned in the comments of one of the answers deleted: "its B" < The user (<span>lolbae0806) had mentioned this...</span>
So I believe the correct answer is:
B.) More oxygen gas became present in the atmosphere.
Answer:
These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if an error is made as DNA copies itself during cell division. Acquired mutations in somatic cells (cells other than sperm and egg cells) cannot be passed to the next generation.
