Answer: If it were written in the third person point of view, the sentence would be C. Helen became impatient at Annie's repeated attempts and seizing the new doll, dashed it upon the floor.
Step-by-step explanation: When third person point of view is used, the narrator tells the way in which a character acts or feels by using proper names or third-person pronouns such as "he", "she" and "they". In that way, the correct answer is C. ("Helen became impatient at Annie's repeated attempts and seizing the new doll, dashed it upon the floor") since it is the only one that presents a proper name ("Helen") instead of using a first-person pronoun as it happens in A. and D. or a second-person pronoun as shown in B.