An electron and a neutron have the same de Broglie wavelength. 

Which is true?
(a) The electron has more kinetic energy and a higher speed.
(b) The electron has less kinetic energy but a higher speed.
(c) The electron has less kinetic energy and a lower speed.
(d) The electron and neutron have the same kinetic energy but the electron has the higher speed.
(e) The neutron has more kinetic energy but the two have the same speed.