Choose the best sentence tat can be made from the given words

1.  bag / heavy / we / take it with us / now

a.      If the bag were not heavy, we would take it with us now.

b.     If the bag is not heavy, we will take it with us now.

c.      Unless the bag was not heavy, we would take it with us now.

d.     Provided that the bag is heavy, we would take it with us now.