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答案：
D
The figure below shows parallelogram P, its altitude h, and an interior angle with degree measure θ. The area of a parallelogram is its base times its altitude. Therefore, the area of parallelogram P is (h)(1) = h. Determine the value of h.
1. Given that θ = 45, it follows that the right triangle in the figure with hypotenuse 1 and side length h is a 45°−45°−90° triangle. Therefore, the length of each of its legs is
times the length of its hypotenuse, and hence 
; SUFFICIENT.
2. Given that
, it follows from the comments above that the area of P is
; SUFFICIENT.
The correct answer is D;each statement alone is sufficient.
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