Answer: B: Called out
Explanation: If you added each option into the sentence, you can see if it makes sense in the context given.
Greg (blank) from across the street, waving and grinning as he ran toward me.
"rained ice" obviously doesn't fit in this sentence because when you say it in the sentence it sounds out of place.
→Greg rained ice from across the street, waving and grinning as he ran towards me.
→Greg caused concern from across the street, waving and grinning as he ran towards me. ("caused concern" doesn't really fit with him waving and grinning at you)
→Greg called out from across the street, waving and grinning as he ran toward me. (This one fits the best in the sentence given the context.)