Final answer:
Technician A is correct in using double insulated electrical tools, while Technician B is not correct in modifying plugs.
Step-by-step explanation:
Technician A is correct in using double insulated electrical tools. Double insulated tools have an additional layer of insulation to provide an extra level of protection against electric shock. These tools are specifically designed for safety when working with electricity and are an important precaution for technicians.
Technician B, on the other hand, is not correct in modifying three-pole electrical plugs to use them in two-pole outlets. Two-pole outlets are designed to have two prongs, and modifying the plug can lead to improper grounding and potentially dangerous electrical situations.
Therefore, the correct answer is A) Technician A only.