Straw:
1. stalks of threshed grain, used as bedding and food for animals, for thatching, and for weaving or braiding, as into baskets.
2. something, such as a hat or basket, made of straw.
3. a slender tube used for sucking up a liquid.
4. something of minimal value or importance.
which is the best meaning for straw as it is used in the following sentence?

there were a couple of trunks indeed, such as a rational man might need, but in addition there were a box of books—big, fat books, of which some were just in an incomprehensible handwriting—and a dozen or more crates, boxes, and cases, containing objects packed in straw, as it seemed to hall, tugging with a casual curiosity at the straw—glass bottles.
a) definition 1
b) definition 2
c) definition 3
d) definition 4