Answer:
The correct option is 2. insufficient RAM in the computer.
Explanation:
While running several programs simultaneously on the computer, if the speed considerably slows down and so does the performance of the programs, this can be attributed to insufficient RAM in the computer to support this level of multi-tasking.
1. Not having enough space on the hard drive has nothing to do with this.
3. Low monitor speed is an irrelevant option.
4. Poorly written program is also irrelevant here.
Hence option 2. insufficient RAM in the computer is the correct answer here.