Question

passage
the first tacoma narrows bridge, in tacoma, washington, opened to traffic on july 1, 1940. the bridge,
which was intended to withstand high winds, collapsed four months later on november 7, 1940, due to a
physical phenomenon known as aeroelastic flutter. flutter is a self - feeding vibration that occurs when
aerodynamic forces on an object couple with a structures natural mode of vibration, producing rapid
periodic motion. thanks to the tacoma collapse, engineers will never again overlook the problem of flutter;
it has influenced the design of every great long - span bridge built since 1940.
question
the passage implies that the true cause of the bridge collapse was
○ low - quality materials
○ short - sighted design
○ substandard craftsmanship
○ unexpectedly high winds

Explanation:

The passage states the bridge was "intended to withstand high winds" but collapsed due to aeroelastic flutter. This implies the design didn't account for the flutter phenomenon properly, which is a short - sighted design aspect. Low - quality materials and substandard craftsmanship are not mentioned. The bridge was supposed to handle high winds, so it's not the unexpectedly high winds (as per the intended design), but the design's failure to consider flutter (a design flaw).

Answer:

short - sighted design