Sentence 1: Cruz was highly allergic to nuts of all kind. 
 Sentence 3: Hours later he got really sick and was rushed to the hospital 
 Sentence 4:  He was having an allergic reaction to nuts 
 Sentence 5:  The lady who baked the cake unknowingly used nuts for the frosting 
 Option 1: He attended his grandma's party and had a bite of pizza. 
 Option 2: He attended his grandma's party and had a piece of cake.