Option B: 
 and 
, so 
 is supplementary to both 
 and 
, so EFGH is a parallelogram.
Option C: 
 so EFGH is a parallelogram.
Option D: 
 so EFGH is a parallelogram.
Explanation:
Option A: 
 and 
 so 
 is supplementary to both 
 and 
, so EFGH is a parallelogram
Let us substitute 
 and 
 in 
, 
 and 
 to determine the exact measures the angles of the parallelogram.
Substituting, we get, 
, 
Thus, 
 because the measures of these angles are not equal.
Hence, Option A is not the correct answer.
Option B:  
 and 
, so 
 is supplementary to both 
 and 
, so EFGH is a parallelogram.
Let us substitute 
 and 
 in 
, 
 and 
 to determine the exact measures the angles of the parallelogram.
Thus, substituting, we have, 
, 
Hence, Option B is the correct answer.
Option C: 
 so EFGH is a parallelogram.
To determine the angles, let us substitute 
 in  
 and 
Thus, 
Since, the opposite angles of a parallelogram are equal, EFGH is a parallelogram.
Hence, Option C is the correct answer.
Option D: 
 so EFGH is a parallelogram.
Let us substitute 
 and 
 in 
, 
 and 
 to determine the exact measures the angles of the parallelogram.
Substituting, we have, 
, 
Adding the angles E and G, we have,

By the property of parallelogram, any two adjacent angles add upto 180.
Thus, the adjacent angles E and G add upto 180.
Hence, Option D is the correct answer.