Answer:
The awnser should be B
Step-by-step explanation:
A) filler words are not a good source to use in presentations meaning they make your presintation look messy.
B) If you use your grammer correctly it can help make whatever you are doing look way nicer.
C) Never write in incomplete sentences it make whatever you are doing look sloppy.
D) Useing double can make it look like you are tring to make a point but still wont really stand out.