Final answer:
The strategic alliance between British Airways and US Air was established in 1993, which is not listed in the given options. The partnership aimed to extend the global presence of both airlines.
Step-by-step explanation:
The strategic alliance between British Airways and US Air was formed in the year 1993. Notably, the correct answer was not listed among the provided options. This partnership was designed to enhance the global reach of both airlines by sharing codes, cooperating on frequent flyer programs, and working together on various operational aspects to benefit customers. However, this alliance faced regulatory challenges and went through several modifications over time.