Answer : yo you need to mark him Fr ^^
1.) m
2.) j
3.) q
4.) h
5.) f
6.) c
7.) i
8.) g
9.) k
10.) e
11.) p
12.) t
13.) a
14.) o
15.) s
16.) n
17.) l
18.) b
19.) r
20.) d
A is wrong you wouldn't say "is" you would say are.
B is wrong to because "was" is not the correct verb to use.
D is wrong because key, should be plural, keys
C is correct, because it has subject and verb agreement.
implausible was first recorded from 1595 to 1605