LTC1695 operation temperature question

HI,

good day!

my customer want to know datasheet definition

as below

about operation temperature range and Junction temperature definition

a. Does operation temperature mean like room temperature or PCB board temperature ??

b. if iC is working, now we measure the package temperature. does it mean junction temperature ??

c. if room temperature out of spec operation temperature range 0 deg C to 70 deg C , could IC  work normally ? because EC table has a item thermal shutdown is 155 deg C.