The correct option is A notice
Option A: 'Notice' means 'to become aware of'.
Option B: 'View' means 'to look at something with an intention to examine it'.
Option C: 'Sight' refers to the power to see.
Option D: 'Glimpse' means 'to see or perceive briefly'.
From these words, 'notice' is the most appropriate one, as it forms a complete thought. 'Notice' is to suddenly become aware of something, and it is relevant to the sentence, hence option A is correct.
The other words do not provide the required meaning; the sentences thus formed are ambiguous.
Hence options B, C and D are incorrect.