D. is having / have
Feedback When we talk about things in general, permanent situations and states or things that happen sometimes, we use the Present Simple Tense. When we describe an event that is happening in the moment of speaking we use the Present Continuous. Remember that some stative verbs (feel, have, see, seem, look, etc.) can be used in continuous form but with the change in meaning. Here: has - refers to possession / is having - means 'is eating'