The correct answer is A. Showing that the main character has a problem to solve
Step-by-step explanation:
A good story, allows characters and events to develop; due to this, a good story focuses on conflict and the way this affects character, especially the effects of it in the main character. Besides this, in stories after the conflict emerges; it develops, which forces the character to face or deal with the conflict. This creates realistic characters with complex feelings, thoughts, emotions, etc. Additionally, the use of conflict and realistic main character/s makes readers be interested in a story because readers will want to know how events will develop and also, they can relate to the character if they have experienced a similar conflict. According to this, the writing technique you can use to create interest in readers is "Showing that the main character has a problem to solve".