Select the correct answer.
Which sum or difference is modeled by the algebra tiles?

A.
(x2 + 4x − 2) + (x2 − 2x − 4) = 2x2 + 2x + 2
B.
(x2 + 4x − 2) + (x2 + 2x + 4) = 2x2 + 2x + 2
C.
(x2 + 4x − 2) − (-x2 + 2x − 4) = 2x2 + 2x + 2
D.
(x2 + 4x − 2) − (-x2 − 2x + 4) = 2x2 + 2x + 2

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e.g. 98.76543).