You are walking to a sheltered bus stop. in the mostly clear, blue sky, you observe the approach of an isolated, thick dark cloud with a top the spreads out (namely, it looks like the letter "t"). what is the most likely weather phenomenon causing this, and what kind of weather hazards or other effects do you anticipate? a. altostratus cloud with 7 oktas coverage, showing a faint spot of light where the sun shines through it. b. cirrostratus cloud with 8 oktas coverage, making a halo where the sun shines through it. c. nimbostratus cloud with 7 oktas coverage, with widespread light rain or snow. d. lecticular cloud with 2 oktas coverage, looking like stacked dinner plates, but with strong turbulence. e. cumulonimbus cloud with 3 oktas coverage, with locally heavy rain, hail, lightning, and strong winds. f. cumulus fractus cloud with 3 oktas coverage, with gusty winds and high humidity g. altocumulus castellanus cloud with 4 oktas coverage, with light turbulence in the cloud