Final answer:
The polynomial in standard form is 2x³ + 5x² - 3x + 7.
Step-by-step explanation:
A polynomial is in standard form when the terms are arranged in descending order of their degree. Degree is the highest exponent of the variable in a term. Based on this definition, the polynomial in standard form is:
1) 2x³ + 5x² - 3x + 7
The other options are not in standard form because the terms are not arranged in descending order of degree.