Problem $2(10$ pts$)$

In the design process of a multi$-$span steel girder bridge, a designer has suggested to use of continuous beams over piers instead of a simple beam for each span. The designer argues this will increase the resilience of the structure by avoiding disproportionate failure of one span.

$($a$)$ Do you agree with the designer? $(3$ points$)$

$($b$)$ Why do you agree or disagree with this approach and how does this decision affect the structure's stability and sustainability? Briefly explain your argument $(7$ points$)$