Temper tantrums that often occur in children between 18 months and three years old are most likely caused by a. children being stubborn. b. frustration over not being able to effectively communicate. c. a reaction to a food allergy. d. children not liking their friends.

I feel like it's most likely B, as by that age, assuming they're not speaking early, they usually babble. They can ask for basic needs by pointing and maybe saying a few words, but communication still isn't solid.

Hope that helped! :)

Have an awesome day! :)

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Primary effectit is the most accurate.