When choosing the best channel for your message, you should consider the importance of the message, the amount and speed of feedback and interactivity required, the necessity of a permanent record, the cost of the channel, the degree of formality desired, the confidentiality and sensitivity of the message, and $\_\_\_\_\_\_\_\_\_.$

a$.$ your own communication channel preferences

b$.$ the receiver$$s preference and level of expertise

c$.$ the ability of the channel to make your company look cutting edge

d$.$ the ability of the channel to showcase your technical expertise