Answer:
A is the answer; 'more-efficient extraction techniques
Explanation:
I just took the test and got it right :D
Butanol (С4Н9OH)
Structural formula is :-
CH3-CH2-CH2-CH2-OH
oxygen is a 15 and nitrogen science chemistry i'm guessing
A: object 1
B: object 2
C: object 1
D: object 1