Can someone tell me the answer plz plz I’ll give you brainlist and points

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

The grooves or folds of the brain are called

What was bohr’s contribution to the planetary model