Why is the Gabriel synthesis more successful with 1-bromopropane compared to 2-bromopropane?

2-bromopropane has a more reactive carbon-bromine bond.

1-bromopropane has less steric hindrance, making nucleophilic attack easier.

1-bromopropane has a higher boiling point, aiding the reaction.

2-bromopropane undergoes faster nucleophilic substitution.