Cobalt-60 Is a Radioactive Isotope of Co That Is Used ${ } _ { 26 } ^ { 58 } \mathrm { Fe }$

Cobalt-60 is a radioactive isotope of Co that is used for radiation therapy. It is produced originally from iron-58 ( ${ } _ { 26 } ^ { 58 } \mathrm { Fe }$ ) according to the step ${ } _ { 26 } ^ { 58 } \mathrm { Fe }\rightarrow$ ${ } _ { 26 } ^ { 59 } \mathrm { Fe }$ )
Which particle did the iron-58 absorb to become iron-59?

A) ( $\alpha$ particle)
B) neutron
C) proton
D) electron
E) ( $\gamma$ ray)