Both acids and bases a) turn red litmus blue. eliminate b) are a component of soaps c) donate protons to solution. d) conduct electricity in water.

Option B and D

Explanation:

Any substance which is able to produce ion, acts as a good conductor of electricity. Both base and acid dissociate in water and produce OH- and H+ respectively which act as carrier of charge. Thus option D is correct.  

Both acid and alcohol forms the part of soap and thus option B is also correct  

However, Litmus turns from blue to red in acidic solution only, thus option A is incorrect. Also, only acid donates proton , hence option C is incorrect.

in a word, a scientific question is testable. a testable question is one that asks about objects, organisms or events found in the world around it

a. the production of carbon dioxide through the process of photosynthesis