Take a look at the passage again:
To stomach the cup of strong coffee that he desperately needed to keep awake.
Lawrence added seven packets of sugar and a quarter cup of cream.
You chose to remove the period after awake and combine the two parts like this:
To stomach the cup of strong coffee that he desperately needed to keep
awake Lawrence added seven packets of sugar
and a quarter cup of cream.
Unfortunately, you cannot connect these two parts in this manner. Review the rules.
Go back to the sentence to try again.