The table gives estimates of the ownprice and crossprice elasticities of demand for bus and rail travel.

Elasticity with respect to the price of

Bus Travel Rail Travel

Good

Bus travel -0.37 +0.13

Rail travel +0.16 -0.43

Other things being equal, what would be the change in the volume of rail travel resulting from a 1% increase in bus fares?

(a) An increase of 0.16%

(b) An increase of 0.43%

(c) An decrease of 0.13%

(d) An decrease of 0.37%

I'm not sure how to read the table. And do I have to use the cross elasticity of demand formula for this question?