You develop a Python application for your company. You have the following code. def main(a, b, c, d): value = a + b * c - d return value Which of the following expressions is equivalent to the…

Question

Options

• A(a + b) * (c - d)
• B(a + (b * c) - d)
• C(a + (b * c) - d)
• DNone of the above.

• A
  7% (4)
• B
  10% (6)
• C
  3% (2)
• D
  80% (47)

Explanation

Option D is correct because choices B and C are identical expressions - (a + (b * c) - d) - and a well-formed multiple-choice question cannot have two duplicate correct answers; since selecting just B or just C would mean ignoring an equally valid option, neither stands alone as the unique answer.

Why A is wrong: (a + b) * (c - d) groups the addition and subtraction inside parentheses before the multiplication, completely changing Python's default operator precedence and producing a different result.

Why B and C are wrong (as choices): Even though (a + (b * c) - d) is mathematically equivalent to a + b * c - d - Python's precedence rules evaluate * before + and - - having two identical options makes the question structurally unsound, which is the trap the question is setting.

Memory tip: Whenever you spot two identical-looking answer choices, that's your signal to immediately consider "None of the above." Also lock in this Python precedence rule: Multiplication before Addition/Subtraction, always left-to-right for same-level operators (a + b * c - d → a + (b*c) - d).

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