Final answer:
Each major release of Android used to be named after a dessert, and each corresponds with a specific API number, making the correct answer 'c. both a and b'. Note that naming was discontinued after Android 9 Pie. So, the correct answer is option c. both a and b.
Step-by-step explanation:
The answer to the student's question about Android releases is c. both a and b. Each major release of Android is indeed named after something sweet; this tradition started with Android 1.5 Cupcake and continued until Android 9 Pie.
However, it is important to note that names were discontinued after Android 10, which is known simply by its version number.
Moreover, each major Android version is associated with an Application Programming Interface (API) number, which indicates the version of the APIs that developers can use to build their applications.
So, the correct answer is option c. both a and b.