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(A)Option D
(B)Option B
(C)Option C
(D)Option A
(A)if invoking open () fails, the value None is returned
(B)instd, outstd, errstd are the names of pre-opened streams
(C)the second open () argument is optional
(D)open () is a function which returns an int that represents a physical file handle
(A)3
(B)15
(C)the code is erroneous
(D)7
(A)10
(B)the variable becomes unavailable
(C)9
(D)11
(A)True lower
(B)True upper
(C)False lower
(D)False upper
(A)import upper.module_c
(B)from pypack.upper.lower import module_c
(C)import upper.lower.module_c
(D)import pypack.upper.lower.module_c
(A)four
(B)three
(C)two
(D)one
(A)it outputs [3, 1]
(B)the code is erroneous and it will not execute
(C)it outputs [4, 2, 0]
(D)it outputs [1, 3]
(A)holds a reference to the currently processed object
(B)is set by the first argument's value
(C)is always set to None
(D)is set to a unique random value
(A)it raises an exception
(B)It outputs 123
(C)it outputs 6
(D)it outputs 321
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