Greta hid her sigh as she opened the gift from her mother. She lifted the new diary from the box, forcing a smile as she posed for a quick photo. She rolled her eyes as she turned away and set the book behind her, knowing it would go unused like the one from last year.
The first sentence in the paragraph
explicitly states that Greta doesn't like her gift
explicitly states that Greta does not like her gift
implicitly states that Greta does like her gift
implicitly states that Greta does not like her gift