Please explain these questions very well and give answers

27.The notation (arr [3]+1) is the same as B. arr [3] [1] C. arr1 131 D. arr 3] [01 E. None of the above 28.The notationa3)+1 the same as A. arr31 (1 B. arr(31(1 C. arr(3 D. arr(31 o E. None of the above 29.Le t arr be decalred as int arr [20] then the statement *(arr+20 20; A. generates a runtime error B. generates a compiling error (syntax error) C. sets the last element in the array to 15 D. overwrites the memory beyond the end of the array E. None of the above