What is is the most important factor in what a nation produces and trades

Abc electronics wants someone to install a top-of-the-line security system in its two buildings, a system that not only sounds an alarm but also simultaneously notifies authorities and the company president. video surveillance of the premises should also be a capability of the security system. n order to obtain price quotes, what should the company write? a.an unsolicited proposal b.an internal proposal c.an external proposal d.a request for proposals