Options traders appear poised for a big move in McDonald’s Corp’s (MCD.N) shares as the world’s biggest restaurant chain is set to unveil a much-awaited turnaround plan on Monday, and bullish bets have picked up in recent days. McDonald’s shares have struggled in the last year as the company faces consumers’ changing tastes and growing preference for healthier fare over processed fast food. Smaller, nimbler competitors such as Wendy’s Co (WEN.O) and Chipotle Mexican Grill Inc (CMG.N) have been more responsive to those changing tastes.