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What is the degree of the polynomial 5x^4 + 3x^2 + 2x + 4?

  1. 2

  2. 3

  3. 4

  4. 5

The correct answer is: 4

The degree of a polynomial is determined by the highest exponent of the term. In this case, the term with the highest exponent is 5x^4, making the degree of the polynomial 4. The other options are incorrect because they do not accurately represent the highest exponent of the polynomial. Option A has a highest exponent of 2, option B has a highest exponent of 3, and option D has a highest exponent of 5, which is not the case for this polynomial. Therefore, option C is the correct choice.