Which one of the following is the most important reason for the establishment of the Vikram Sarabhai Space Centre at Thumba

(a)

The sea is near to the place in the East, West and South directions

(b)

It is a place near to a city in India, which is nearest to the Geographic Equator

(c)

It is situated on the Geomagnetic Equator

(d)

Outer space near Thumba exhibits queer atmospheric phenomena