Final answer:
The question relates to the breaking strength of a utility-grade guy wire, a topic within the field of engineering. However, the exact breaking strength is not provided in the information and would typically be found in manufacturer's specifications or engineering standards. The question appears to be fact-based, requiring specific data not included here.
Step-by-step explanation:
The breaking strength of 5/16 utility-grade guy wire is not explicitly listed in the provided information, which instead focuses on concepts such as force in newtons, resistivity of wires, compression and tension in poles and wires, and the stress and strain relationship for materials. These concepts are pertinent to physics and engineering, as they relate to the properties of materials and how forces affect them.
However, based on common knowledge beyond the information provided, utility-grade guy wires are designed to have high breaking strengths to withstand various loads and weather conditions, but without the specific specifications or a reference to a standard, we cannot confidently provide the exact breaking strength of 5/16 utility-grade guy wire. Such information is typically obtained from the manufacturer's specifications or engineering tables that list the breaking strengths for different grades and diameters of guy wires.
For educational purposes and regarding the multiple-choice options given in the question (a. 1,500 lbs, b. 2,000 lbs, c. 2,500 lbs, d. 3,000 lbs), this looks more like a fact-based question rather than a calculation or concept explanation, and finding the correct answer would require access to the correct specifications or standards.