If the investor groups the franchises by type of food focused upon, and then uses simple random sampling to identify a proportionate number of franchises from each group, what kind of sampling is she doing

Stratified random sampling or proportional random sampling

Step-by-step explanation:

Firstly, the franchises are divided into smaller groups depending on shared attributes or characteristics.

After the grupation, the investor uses simple random sampling to identify some further proportion.

Since small grups obtained by the division are known as strata, the investitor is doing stratified random sampling.