Final answer:
The exact percentage of Logistics/SC executives retiring in the next 10-15 years cannot be determined without specific demographic data and studies. Factors like age distribution, retirement policies, and industry trends all influence the potential retirement rate.
Step-by-step explanation:
The direct answer to the question regarding the percentage of current Logistics/Supply Chain (SC) executives who will retire in the next 10-15 years is not provided as this information depends on specific industry studies and demographics which can vary over time and have not been specified in the question. Therefore, it's not possible to select options a, b, c, or d without current and specific data.
An explanation for the absence of a specific percentage includes the consideration of various factors such as the age distribution of current executives, differing retirement ages across countries, industries, and individual companies, as well as potential changes to retirement policies. Furthermore, with ongoing developments in technology and shifts in labor demographics, the rate of retirement could also be influenced by a number of unforeseen factors such as changes in health, economic conditions, and shifts in career trends. To establish an accurate percentage, one would need to conduct or refer to a detailed demographic study of the logistics/SC sector, focused on the executive level, and take an account of the average retirement age within that industry. Without such targeted research, any answer provided would lack factual accuracy.