By Dan Marsh Roy Keane praised Marcus Rashford’s body language following his first-half performance in Sunday’s Manchester derby. The Manchester United forward has endured a difficult season and came out fighting earlier this week at critics who had honed in on his body language on the pitch. He silenced said critics in style, too, by dispatching a thunderbolt beyond Ederson in the eighth minute at the Etihad. Manchester City would produce a rousing second-half fightback to win the match 3-1 courtesy of a brace from Phil Foden and a late goal from Erling Haaland. But Rashford was lauded at the…