Which of the following carbocations will undergo rearrangement?

The order of circled $C-H$ bond dissociation energy in the following compounds is:

Which of the following carbocations is most stable?
$A) (CH_3)_2CH-CH^+-CH_3$
$B) (CH_3)_2C^+-CH_2CH_3$

Arrange the following in decreasing order of stability.
$(i)$ $CH_3^{\bullet}$,$(CH_3)_3C^{\bullet}$,$(CH_3)_2CH^{\bullet}$ and $CH_3CH_2^{\bullet}$
$(ii)$ $CH_3CH_2^{+}$,$(CH_3)_3C^{+}$,$(CH_3)_2CH^{+}$ and $CH_3^{+}$

The stability of the following carbocations decreases in the order:

The bond dissociation energy needed to form the benzyl radical from toluene is $.....$ than the formation of the methyl radical from methane.