What exactly does the term "reduced" mean in the context of a computer with a restricted instruction set?

What is meant by the term "reduced" when it is used in the phrase "reduced instruction set computer"?

In this classification, instructions are executed independently of one another's data sources. a(n): A Multiple Data Multiple Instruction B Multiple Data Multiple Instruction C Single Data Individual Instruction D Simultaneous In

What exactly does it mean for a computer to have a "reduced" instruction set when it already has a "limited" one?

So, what does "reduced" imply in the context of "reduced instruction set computer"?

In this case, every instruction gets its own data in a way that is completely separate from how the data of other instructions is obtained. We utilize: A Multiple Data/Instruction B Multiple Data/Instruction C Singular Data Single Inst D Singe Inst Multiple