Final answer:
The first two standard SI measurements in chemistry were the meter for length and the kilogram for mass, forming the basis of the metric system.
Step-by-step explanation:
The first two standard measurements of the SI in chemistry were the meter (m) and the kilogram (kg). The meter is the SI base unit for length, and the kilogram is the SI base unit for mass. Together, along with other base units such as the second (s) for time and the ampere (A) for electric current, they form part of the metric system which uses powers of 10 to relate quantities over the vast ranges encountered in nature. Therefore, the correct answer to the student's question is A) Meter and kilogram.