The Python interpreter evaluates the boolean expression assigned to val3. The expression contains a logical or operator, which evaluates its operands from left to right.

1. The left operand, val1 > val2, becomes 10 > 20, which evaluates to False.

2. Since the left operand is False, the or operator proceeds to evaluate the right operand.

3. The right operand is val2 % val1 == 0. The modulo operation 20 % 10 results in 0. The comparison 0 == 0 evaluates to True.

4. The entire expression becomes False or True, which results in True.

5. The value True is assigned to val3 and subsequently printed to the console.

B. None is a special constant in Python representing the absence of a value; it is not the result of this boolean expression.

C. The expression evaluates to True because the condition on the right side of the or operator (val2 % val1 == 0) is met.

D. The code is syntactically correct. All variables are defined, and the operators (>, %, ==, or) are used according to Python's syntax rules.

1. Python 3.12.3 Documentation, The Python Language Reference:

Section 6.8, Boolean operations: "The expression x or y first evaluates x; if x is true, its value is returned; otherwise, y is evaluated and the resulting value is returned." This confirms the evaluation logic.

Section 6.17, Operator precedence: This table shows that arithmetic operators (%) have higher precedence than comparison operators (>, ==), which in turn have higher precedence than boolean operators (or). This dictates the order of evaluation.

2. MIT OpenCourseWare, 6.0001 Introduction to Computer Science and Programming in Python, Fall 2016:

Lecture 2: Core Elements of Programs, Slides (PDF): Page 23 discusses comparison operators (>) and logical operators (or), explaining that a or b is True if at least one of a or b is True. This supports the outcome of the expression.