I chose letter b.
When you plan for long-term sustainability, you want to make sure that
everything would last for a long time.
These plans would make improvements that people can sustain in the long
run that would benefit the inhabitants.
<span>This is an example of thoughts causing feelings. According to the Cognitive theory, emotions are products of our thoughts, not situations. <span>Sometimes we have thoughts called irrational thoughts, which are products of situations we live in the past, these thoughts are not in accordance with reality.
I hope this answer can help you.
</span></span>
Because it was harder to travel over moountains.