Read the following context and choose the best option to answer the question.
Context: I awoke this morning in a room that seems unusually light . At first I thought I 'd fallen asleep with the light on , so unaccustomed I am to this phenomenon . Then , with glorious reality I realised it was the light of day . I sprang up out of bed and looked out the window .
Question: What happened before i got out of bed ?
Options: 
A. It seemed to be pitch dark .
B. I decided to stay in bed and sleep more .
C. I realized that i had slept the whole day away .
D. My room was lit up very brightly .


D